| ┌1A. | PetiolePetiole: Leaf stem.
s green or reddish, with inconspicuous paler longitudinal striae .. 2
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| │ | ┌2A. | PistilPistil: The female reproductive part of a flower.
late flower zone abruptly wider than staminate flower zone; pistilPistil: The female reproductive part of a flower.
s pale orange. Batang Ai (Sarawak) and N part of Ulu Sungai Kapuas (Kalimantan Timur), sandstones .. 📌Homalomena hanneae
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| │ | ├2B. | PistilPistil: The female reproductive part of a flower.
late flower zone imperceptibly merging with, or slightly narrower than, staminate flower zone; pistilPistil: The female reproductive part of a flower.
s not pale orange .. 3
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| │ | │ | ┌3A. | PistilPistil: The female reproductive part of a flower.
late flowers green. Batang Ai (Sarawak), sandstones .. 📌Homalomena sengkenyang
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| │ | │ | ├3B. | PistilPistil: The female reproductive part of a flower.
late flowers white or yellowish .. 4
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| │ | │ | │ | ┌4A. | Inner side of the posteriorPosterior: 
lobes (i.e., facing across the sinusSinus:
) rounded, the edges almost touching in robust specimens; leaf blade glossy dark reddish green adaxially, dark purplered abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly; stipeStipe: A stalk or stem.
of spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
strongly dorso-ventrally flattened, c. 8.5 mm long 3 4.5 mm diam. Mulu (NE Sarawak), alluvial forest .. 📌Homalomena ardua
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| │ | │ | │ | ├4B. | Inner side of the posteriorPosterior:
lobes (i.e., facing across the sinusSinus:
) straight, their edges divergent; leaf blade glossy medium green adaxially, somewhat paler abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly; stipeStipe: A stalk or stem.
of spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
cylindrical .. 5
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| │ | │ | │ | │ | ┌5A. | Leaf blade not or only very weakly quilted between the primary lateral veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins. 
s; petiolePetiole: Leaf stem.
and pedunclePeduncle: Flower stem.
dull purple red (at least the basalBasal: Forming or belonging to a bottom layer or base.
part but more usually the whole organ, with conspicuous paler longitudinal ridges, spatheSpathe: A large sheathing bract enclosing the flower cluster.
limb with red margin. Bintulu (N Sarawk), alluvium in seasonally flooded forest .. 📌Homalomena josefii
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| │ | │ | │ | │ | ├5B. | Leaf blade conspicuously quilted between the primary lateral veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
s .. 6
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| │ | │ | │ | │ | │ | ┌6A. | PedunclePeduncle: Flower stem.
minutely puberulentPuberulent: Covered in soft, downy hairs.
(appearing velvety); leaf blade glaucousGlaucous: Covered with a whitish powder or waxy coating.
abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly. Santubong (NW Sarawak), Paleogene hard sandstones .. 📌Homalomena velutipedunculata
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| │ | │ | │ | │ | │ | ├6B. | PedunclePeduncle: Flower stem.
glabrousGlabrous: Smooth. Free from hair or down.
, glossy or somewhat matte; leaf blade not glaucousGlaucous: Covered with a whitish powder or waxy coating.
abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly .. 7
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| │ | │ | │ | │ | │ | │ | ┌7A. | Staminate zone not producing resin droplets, resin remaining in the fissures between individual flowers; lower part of persistentPersistent: Remaining attached to the plant beyond the usual time of falling.
spatheSpathe: A large sheathing bract enclosing the flower cluster.
during fruiting ventrally much expanded, with dorsal side almost flat; unpollinated pistilPistil: The female reproductive part of a flower.
s remaining yellowish white at early stage of staminate anthesisAnthesis: The period during which pollen is presented and/or the stigma is receptive.
. Siburan (SW Sarawak), limestones .. 📌Homalomena gastrofructa
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| │ | │ | │ | │ | │ | │ | └7B. | Staminate zone producing droplets of resin; lower part of persistentPersistent: Remaining attached to the plant beyond the usual time of falling.
spatheSpathe: A large sheathing bract enclosing the flower cluster.
during fruiting expanding more-or-less equally ventrally and dorsally, eventually fusiform; unpollinated pistilPistil: The female reproductive part of a flower.
s turning dark orange at early stage of staminate anthesisAnthesis: The period during which pollen is presented and/or the stigma is receptive.
. Matang (W Sarawak), Paleogene soft sandstones .. 📌Homalomena debilicrista
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| │ | │ | │ | │ | │ | │ | └1B. | PetiolePetiole: Leaf stem.
proximally green and distally white with very conspicuous prominently raised glossy cherry-red ridges; leaf blade abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly glaucousGlaucous: Covered with a whitish powder or waxy coating.
. Mulu (NE Sarawak), shales .. 📌Homalomena striatieopetiolata
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